Pigment pastes



Patented May 30, 1939 2,160,119

UNITED STATES PATENT OFFICE PIGMENT PASTES Karl Brodersen, Dessau in Anhalt, Germany, as-

signor to General Aniline Works, Inc., New York, N. Y., a corporation of Delaware No Drawing. Application December 31, 1936, Serial No. 118,571. In Germany January 6, 1936 2 Claims. (Cl. 134-58) The present invention relates to a process for Oleyl poly glycol dimethylammonium methyl producing aqueous dye-pigment pastes and to the sulfate: products obtainable according to this process. 3

It is known that aqueous pastes of dye pig- GWEFILCHQ 5 ments as they are manufactured and used for many purposes, for instance, for printing wall 5 papers, have a greater coloring capacity than $020011: that of the powders made by drying them Even Trimethylammonium acetic acid dodecyl ester the addition of a wetting agent in the production i ei of a paste from the powder does not essentially 1o improve the coloring capacity. For avoiding an C H O CH QH unnecessary transportation of water involved by CH marketing the aqueous pastes and also any dam- C1 3 age by frost and to facilitate more convenient The body having cation activity may be mixed 15 packing and apportioning in use it is very with the powdered pigment itself or with the sirable that a solid product should be marketed. aqueous substratum which is used f r producing This invention is based on the observation that a paste pulvel'ulent dried Pigment pastes of appearance The following examples illustrate the invention, and coloring power practically equal to those of the parts being by wieght;

the aqueous pastes are obtainable when the paste Example parts f a dye pigment which 20 is produced in the presence of a quaternary oris of particularly poor wetting capacity, for ganic base or a salt thereof which contains at ample Hansa Yellow 5 G, are made into. a paste least one aliphatic or cycloaliphatic radicle having with parts f an aqueous solution of 10 per cent more than 5 carbon atoms. It is immaterial what strength f stearyl pyridinium chloride and fter 25 the Ponstmction of this base Salt may be m addition of further '75 parts of water the paste 25 detall; the carbon chain may, for example be is allowed to stand overnight and then passed interrupted by an atom or atom r up f through a sieve. There is thus obtained a comthancarbon or it may be branched or contain letely uniform paste which corresponds with the Substltuentsoriginal dye paste in dispersion and as a size Th invention COIISiStS, therefore, in producing color applied with the usual substratum is equiva- 30 aqueous pastes Suspensions of Pigment dyes lent in color strength to the original paste.

which have a high coloring capacity by using as Example 2 a dispersing agent a quaternary ammonium com- Parts pound the constitution of which comprises an aliphatic or a cycloaliphatic radicle having more Dlmethylbenzylpalmltylammomum 35 than 5 carbon atoms. Examples of suitable com- 3 pounds are as follows: An alkyd resin emuls1on of 50 per cent.

strength 100 Dodecyltrimethylammonium chloride: Zinc White 100 40 CH3 7 Water 40 O|zHz5-N- CH3 are thoroughly stirred together.

In this manner a completely homogeneous 1 CH3 painting material is obtained while without addi- Stearyldioxyethylmethylammonium methyl sultion of t ammonium compouPd the dispersion fate: of the pigment in the alkyd resin emuls1on is es- GHlOHOH sentially worse. It is obvious that my invention is not limited to the foregoing examples or to the specific details 0H3 given therein. s 020 CH: Instead of the ammonium compound mentioned 50 above, there may be used trimethyloctylammo- Stearyl pyndinium chloride nium chloride or dimethyl butyloleylammonium chloride or similar compounds. Furthermore, the ammonium compounds are useful for the purpose 01 set forth which contain other high molecular 55 alkyl radicles which correspond to the carboxylic acids contained in natural fats, oils or waxes. Other ammonium compounds bearing free hydroxy groups or an etherified or esterified hy- 5 droxy group, are mentioned above.

What I claim is: 1. Aqueous pigment pastes consisting of a pigment, a dispersing agent consisting of a quaternary ammonium compound which contains a radical with more than 5 carbon atoms, and Water.

2. Aqueous pigment pastes consisting of a pigment, a dispersing agent consisting of a pyridinium compound, and water.

KARL BRODERSEN. 

